html>
script language="javascript">
//var pattern = /[^"]*/; //校驗字符串中是否都是非雙引號的字符
var pattern = /["]+/; //校驗字符串中是否有雙引號的字符
//var pattern = /["][^"]*["]/ //匹配的是位于單引號或者雙引號之內(nèi)的0個或多個字符
var value1 = "The best things in life are free"; //沒有雙引號的字符串
var value2 = "/"/"The /"best things /"in life are free/"/""; //有雙引號的字符串
alert("value1沒有雙引號的字符串 pattern.exec_1===" + pattern.exec(value1)); //null
alert("value1沒有雙引號的字符串 !pattern.exec_2===" + !pattern.exec(value1)); //true
alert("value2有雙引號的字符串 pattern.exec_1===" + pattern.exec(value2)); //""
alert("value2有雙引號的字符串 !pattern.exec_2===" + !pattern.exec(value2)); //false
if(pattern.exec(value1)){ //校驗字符串中是否都是非雙引號的字符
alert("value1 沒有加非號 ++++++雙引號被匹配上");
}
if(!pattern.exec(value1)){ //校驗字符串中是否有雙引號的字符
alert("value1 有加非號 ++++++雙引號被匹配上"); //頁面窗口彈出
}
if(pattern.exec(value2)){ //校驗字符串中是否都是非雙引號的字符
alert("value2 沒有加非號 ++++++雙引號被匹配上"); //頁面窗口彈出
}
if(!pattern.exec(value2)){ //校驗字符串中是否有雙引號的字符
alert("value2 有加非號 ++++++雙引號被匹配上");
}
/script>
/html>
